Plumbing fitting



FIG. 1 is a top front right perspective view of the plumbing fitting showing my new design.

FIG. 2 is a front view thereof.

FIG. 3 is a right side view thereof.

FIG. 4 is a left side view thereof.

FIG. 5 is a back view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings represent portions of the plumbing fitting that form no part of the claim. 

CLAIM The ornamental design for a plumbing fitting, as shown and described. 